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F3SG-SR
User’s Manual
Chapter2 Muting
System Operation and Functions
E
• Reduce a distance between a workpiece and a muting sensor to prevent reflected light from a workpiece
(2) Interference to a muting sensor from the F3SG-SR
• Take distance (D) from a sensor causing the interference
• Displace beams for each other to prevent interference (change installation height or place them
crosswise)
• Install a physical barrier
• Arrange sensors in alternation
• Lower the sensitivity
(3) Interference to the F3SG-SR from a muting sensor
• Use a red LED type sensor (such as retro-reflective E3Z-R series)
• Use laser-type sensors (such as laser-type E3Z-LR series)
• Take distance (D) from a sensor causing the interference
• Displace beams for each other to prevent interference (change installation height or place them
crosswise)
• Install a physical barrier
• Arrange sensors in alternation
• Attach a slit to reduce light intensity (provided for E3Z series as accessories)
Mutual interference between a muting sensor and F3SG-SR in (2) and (3) above can be prevented by
configuring D satisfying a formula shown below:
• If L = 0.3 to 3 m, D = 0.26 m or larger
• If L = 3 m or larger, D = L x tan5° = L x 0.088 m or larger
L : Distance between an emitter and a receiver of the F3SG-SR
D : Distance between a muting sensor and a F3SG-SR
2-13-3. Exit-Only Muting Mode
2-13-3-1. Overview
Turning the muting inputs A and B ON with time difference enables MUTING.
Difference from Standard Muting mode exists in the muting completion condition.
Start conditions
If both of the following two conditions are satisfied, the MUTING state is enalbed.
1. No blocking object is found in the F3SG-SR's detection zone, and the safety outputs are ON.
2. After the muting input A is turned ON*, the muting input B is turned ON* within the range between
the muting input time limit values T1min (0.1 s) and T1max (4 s).
*PNP setting: Vs-3V to Vs, NPN setting: 0 to 3V
The MUTING state can be enabled in up to 80 ms after the condition No.2 is satisfied.
If the condition No.1 is satisfied but the time requirement of the condition No.2 is not, a muting error
occurs, and the SEQ indicator on the receiver turns ON. However, when there is a muting error, the
F3SG-SR continues the normal operation with the safety function enabled.
For muting error indication, see 8-1-3-3. Muting Sequence Error Indication.
The Muting error state can be released by any of following conditions:
1. Correct initial muting condition continues for 0.1 s or longer. *
2. Power cycle when the muting inputs A and B are in the OFF state.
* The correct initial muting condition is the state where the following two conditions are satisfied.
• Safety outputs of the F3SG-SR are turned ON.
• Muting input A and B are turned OFF.
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